1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_floatdidf
3
4 #include "int_lib.h"
5 #include <float.h>
6 #include <stdio.h>
7
8 // Returns: convert a to a double, rounding toward even.
9
10 // Assumption: double is a IEEE 64 bit floating point type
11 // di_int is a 64 bit integral type
12
13 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
14
15 COMPILER_RT_ABI double __floatdidf(di_int a);
16
test__floatdidf(di_int a,double expected)17 int test__floatdidf(di_int a, double expected)
18 {
19 double x = __floatdidf(a);
20 if (x != expected)
21 printf("error in __floatdidf(%llX) = %a, expected %a\n", a, x, expected);
22 return x != expected;
23 }
24
25 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
26 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
27 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
28
main()29 int main()
30 {
31 if (test__floatdidf(0, 0.0))
32 return 1;
33
34 if (test__floatdidf(1, 1.0))
35 return 1;
36 if (test__floatdidf(2, 2.0))
37 return 1;
38 if (test__floatdidf(20, 20.0))
39 return 1;
40 if (test__floatdidf(-1, -1.0))
41 return 1;
42 if (test__floatdidf(-2, -2.0))
43 return 1;
44 if (test__floatdidf(-20, -20.0))
45 return 1;
46
47 if (test__floatdidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
48 return 1;
49 if (test__floatdidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
50 return 1;
51 if (test__floatdidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
52 return 1;
53 if (test__floatdidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
54 return 1;
55
56 if (test__floatdidf(0x8000008000000000LL, -0x1.FFFFFEp+62))
57 return 1;
58 if (test__floatdidf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62))
59 return 1;
60 if (test__floatdidf(0x8000010000000000LL, -0x1.FFFFFCp+62))
61 return 1;
62 if (test__floatdidf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62))
63 return 1;
64
65 if (test__floatdidf(0x8000000000000000LL, -0x1.000000p+63))
66 return 1;
67 if (test__floatdidf(0x8000000000000001LL, -0x1.000000p+63))
68 return 1;
69
70 if (test__floatdidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
71 return 1;
72
73 if (test__floatdidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
74 return 1;
75 if (test__floatdidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
76 return 1;
77 if (test__floatdidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
78 return 1;
79 if (test__floatdidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
80 return 1;
81 if (test__floatdidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
82 return 1;
83
84 if (test__floatdidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
85 return 1;
86 if (test__floatdidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
87 return 1;
88 if (test__floatdidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
89 return 1;
90 if (test__floatdidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
91 return 1;
92 if (test__floatdidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
93 return 1;
94
95 if (test__floatdidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
96 return 1;
97 if (test__floatdidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
98 return 1;
99 if (test__floatdidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
100 return 1;
101 if (test__floatdidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
102 return 1;
103 if (test__floatdidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
104 return 1;
105 if (test__floatdidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
106 return 1;
107 if (test__floatdidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
108 return 1;
109 if (test__floatdidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
110 return 1;
111 if (test__floatdidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
112 return 1;
113 if (test__floatdidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
114 return 1;
115 if (test__floatdidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
116 return 1;
117 if (test__floatdidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
118 return 1;
119 if (test__floatdidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
120 return 1;
121 if (test__floatdidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
122 return 1;
123 if (test__floatdidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
124 return 1;
125
126 return 0;
127 }
128